Magnetic disk device and method

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12051452
SERIAL NO

18243069

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Abstract

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According to an embodiment, a magnetic disk is provided with a servo sector in which a preamble and a burst pattern are recorded. A recording frequency of the preamble is different from an even multiple of a recording frequency of the burst pattern. A controller determines a demodulation period of the burst pattern while a magnetic head passes through the servo sector. The controller acquires a first phase of a demodulation signal of the burst pattern and acquires first position information of the magnetic head, by demodulating the burst pattern in the demodulation period. The controller corrects the first position information on the basis of the first phase. The controller executes positioning control of the magnetic head on the basis of second position information that is post-correction first position information.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA TOSHIBA1-1 SHIBAURA 1-CHOME MINATO-KU TOKYO 105-0023
TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION1-1 SHIBAURA 1-CHOME MINATO-KU TOKYO 105-0023

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tagami, Naoki Yokohama Kanagawa, JP 81 475

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